Windows users have been enjoying music metadata cleaner TuneUpsince we first posted about it, but now TuneUp's ready for your Mac. It's currently an invite-only beta, so if you're interested, send an email to lifehacker@tuneupmedia.com with a message containing your name and only your name. They'll send an invite back your way sometime today. While you're at it, check out previously mentioned GimmeSomeTune. UPDATE: Looks like we reached our invite quota. If you didn't make the cut, you've been added to TuneUp's email list and will be alerted when it's officially available.